Setting up the project
Start by launching After Effects and creating a new project.
1. If After Effects isn’t open, start it, and then immediately hold down Ctrl+Alt+Shift
(Windows) or Command+Option+Shift (macOS) to restore default preferences settings.
When prompted, click OK to delete your preferences, and click New Project in the Home
window.After Effects opens to display an empty, untitled project.
2. Choose File > Save As > Save As.
3. In the Save As dialog box, navigate to the Lessons/Lesson14/Finished_Projects folder.
4. Name the project Lesson14_Timewarp.aep, and then click Save.
5. Click New Composition From Footage in the Composition panel. Then navigate to the
Lessons/Lesson14/Assets folder on your hard disk, select the Group_Approach.mov, and
click Import or Open.After Effects creates a new composition named for the source file, and displays it in the
Composition and Timeline panels.
6. Choose File > Save to save your work.Using Timewarp
In the source footage, a group of young people approaches the camera at a steady pace. At
around 2 seconds, the director would like the motion to begin to slow down to 10%, and then
ramp back up to full speed at 7:00.
1. With the Group_Approach layer selected in the Timeline panel, choose Effect > Time >
Timewarp.
2. In the Timewarp area of the Effect Controls panel, make sure Pixel Motion is selected in the
Method menu and Speed is selected in the Adjust Time By menu.With Pixel Motion selected, Timewarp creates new frames by analyzing the pixel movement in
nearby frames and creating motion vectors. The Speed option controls the time adjustment by
percentage rather than by a specific frame.
3. Go to 2:00.
4. In the Effect Controls panel, set the Speed to 100 , and click the stopwatch ( ) to set a
keyframe.